: Set to false if you want to bypass the slower disk cache entirely and rely only on RAM.
Web browsers typically use two types of caches: and memory cache .
: Stores data on your hard drive or SSD. It is persistent but relatively slow to access. Browser.cache.memory.capacity
The browser.cache.memory.capacity integer specifically controls the maximum size of this fast-access RAM cache in . Why Adjust It?
Most users never need to touch this setting because modern Firefox versions (v4.0+) use dynamic cache sizing based on your available system resources. However, manually adjusting it can be beneficial in several scenarios: : Set to false if you want to
: If you have a computer with limited RAM (e.g., 2GB or less), capping this value can prevent the browser from "hogging" memory and slowing down other applications.
: Automatically determines the cache size as a percentage of your physical RAM. 0 : Disables the memory cache entirely. It is persistent but relatively slow to access
Historically, the MozillaZine community suggested these starting points for older hardware: Physical RAM Suggested Cache Value (KB) -1 (Automatic) Related Settings for Better Performance
To get the most out of your memory cache, ensure the following related preferences are also set correctly in about:config :
: Type browser.cache.memory.capacity into the filter box.